I had an x120e for awhile, sold it to a relative after I bought the x220.
They are both really nice portable laptops. 100% matte cases with no bling, both have screens a step above most in their class (matte in a netbook, IPS in an ultraportable) and IMO easily the best keyboards. The x120 chiclet style blows away every other netbook I've touched (which is many) and the large x220 keys are better than a lot of common desktop keyboards I've suffered. (not counting my personal mechanical ones)
If you are willing to wait for the right combination of deals, they can get pretty cheap.
There is a fair amount of griping on boards of various issues with both models but I didn't have any of the supposedly "common" problems.
E5 1680 v2 @ 4.5ghz - "Yes Virginia, they are unlocked"
WTB E5 169x v3 - c'mon intel, put them in the distribution channels already! (v4 also acceptable)